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| author | Tim 'mithro' Ansell <mithro@mithis.com> | 2017-04-18 16:15:51 +1000 |
|---|---|---|
| committer | Stafford Horne <shorne@gmail.com> | 2017-04-21 23:56:00 +0900 |
| commit | 3fee028d1ea02cd16470dc5c65d54974ef85b673 (patch) | |
| tree | a3c5ffc541f87d3ca753306e83d7999bb23fc2a8 /target/m68k | |
| parent | 356a2db3c6f84e8e79e5afa3913514184bff5f50 (diff) | |
target/openrisc: Implement EPH bit
Exception Prefix High (EPH) control bit of the Supervision Register
(SR).
The significant bits (31-12) of the vector offset address for each
exception depend on the setting of the Supervision Register (SR)'s EPH
bit and the Exception Vector Base Address Register (EVBAR).
If SR[EPH] is set, the vector offset is logically ORed with the offset
0xF0000000.
This means if EPH is;
* 0 - Exceptions vectors start at EVBAR
* 1 - Exception vectors start at EVBAR | 0xF0000000
Signed-off-by: Tim 'mithro' Ansell <mithro@mithis.com>
Signed-off-by: Stafford Horne <shorne@gmail.com>
Diffstat (limited to 'target/m68k')
0 files changed, 0 insertions, 0 deletions